Question

我正在将SQL别名设置为变量，以替换下面的excel公式

=+IF((O2+Z2)=0,0,+IF(AA2=0,(O2*-1),+IF(AND(AA2>0,(((R2*O2)/(O2+Z2))+H2)<= (O2*-1)),(O2*-1),(((R2*O2)/(O2+Z2))+H2))))

上面是“已付的大笔税收”的公式，但是我需要检查SQL如果AA（平衡）列为零，然后设为0

即自治区税负数，即公式的这一位（IF（AA2 = 0，（O2 * -1））。如果AA（平衡）不为0，则公式有效，但如果为零，则计算不正确

“已付的居民税”公式如下

(Nett Remittance * Borough Tax)/(Borough Tax + Net_W_and_S_1) + (a.amt_benefit)

(((a.amt_remit) + (a.amt_refunds)) * ((a.amt_debit) + (a.amt_costs) + (a.amt_penalties) + (a.amt_write_off) + (a.amt_transitional) + (a.amt_lump_disc))/NULLIF((( (a.amt_debit) + (a.amt_costs) + (a.amt_penalties) + (a.amt_write_off) + (a.amt_transitional) + (a.amt_lump_disc)) + ((a.amt_water)+(a.amt_water_disab_redn)+(a.amt_water_disc)+(a.amt_sewerage)+(a.amt_sewerage_disab_redn)+(a.amt_sewerage_disc)+(a.amt_sewerage_transit)) ) , 0)) + (a.amt_benefit) AS Borough_Tax_Paid,


(a.amt_debit) + (a.amt_costs) + (a.amt_penalties) + (a.amt_write_off) + (a.amt_transitional) + (a.amt_lump_disc) AS Borough_Tax

(a.amt_remit) + (a.amt_refunds) AS Net_Remittance

(a.amt_water)+(a.amt_water_disab_redn)+(a.amt_water_disc)+(a.amt_sewerage)+(a.amt_sewerage_disab_redn)+(a.amt_sewerage_disc)+(a.amt_sewerage_transit) AS Net_W_and_S_1

Answer 1

使用CASE语句，例如：

CASE 
  WHEN Balance = 0 THEN -- some value, or a formula
  WHEN Balance < 0 THEN -- maybe some other value, or a formula  
  ELSE -- another value, or formula
END AS Something

如果要将其应用于某些复杂公式的结果，则可以使用子查询：

SELECT CASE
         WHEN Balance = 0 THEN 0
         ELSE Something / Balance
       END AS SomethingDividedByBalance
  FROM (SELECT -- huge formula ending with AS Balance
             , -- another formula AS Something
          FROM yourTables
     ) subquery

如何使用别名或变量在SQL中比较值

1 个答案: